What usually causes it
- A loose, missing or wrong gas cap
- A worn cap seal
- A cracked filler pipe or hose
- A stuck purge or vent valve
P0457Starts at: OK to drive, fix when convenient
Fuel vapor leak found: gas cap loose or missing
The computer found a leak in the fuel vapor system. The most likely cause is a gas cap that is loose, missing or the wrong one.
Check this first
Put the gas cap back on and tighten it until it clicks. If the cap is cracked or the seal is worn, a new one is low cost. The light can take a few days of driving to turn off.
What to watch for
- A strong smell of gas
- Fuel dripping under the car
- Trouble filling the tank
Can I keep driving?
We rate P0457 as OK to drive, fix when convenient, as a starting point. Keep an eye on the signs below. If the light starts flashing, stop driving soon.
Quick answers about P0457
What does P0457 mean?
Fuel vapor leak found: gas cap loose or missing. The computer found a leak in the fuel vapor system. The most likely cause is a gas cap that is loose, missing or the wrong one.
Can I keep driving with P0457?
We rate P0457 as OK to drive, fix when convenient, as a starting point. Keep an eye on the signs below. If the light starts flashing, stop driving soon.
What usually causes P0457?
The most common causes, in order: A loose, missing or wrong gas cap; A worn cap seal; A cracked filler pipe or hose; A stuck purge or vent valve.
Estimates only. A mechanic should confirm. The same code can mean slightly different things on different cars; the app explains it for your exact year, make, model and mileage.